Your post is very confusing. First, what do you mean by “Debit Note balance?” I assume you are referring to Supplier credits, which is the account–in older versions of Manager–that a debit note would show up in. A recent software version update eliminated the separate Supplier credits account. Now, credits from a supplier simply reduce the Accounts payable balance for that supplier. Accounts receivable is not involved at all.
This is not necessary. Any amount owed to you by a supplier will be automatically applied to the next invoice.
What you are doing is burying errors in the Accounts payable account.
So…update your software. Then go back and get rid of all those negative supplier credit entries. They are distorting your bookkeeping.